It's hard not to love John Green. The author of "The Fault In Our Stars" is also an incredibly popular internet personality, and he hosts — among many, many other things — a weekly video series over at mentalfloss that is packed with fascinating info.

We've enjoyed pretty much every mentalfloss video thus far, but the latest one is right up our alley.

In the new episode, Green tells of 55 movies that, for whatever reason, went unfinished. Some of the stalled projects have become well-known over the years, like Nic Cage's Superman flick, but most are new to us.